Journal ArticleDOI
Phosphorus-Proton Spin-Spin Coupling and Conformation of a Dinucleoside Phosphate
Masamichi Tsuboi,Seizo Takahashi,Yoshimasa Kyogoku,Hikoya Hayatsu,Tyunosin Ukita,Masatsune Kainosho +5 more
TLDR
The phosphorus-31 nuclear magnetic resonance spectrum of β-adenosine-3'-β-adeno-5'-phosphoric acid in its aqueous solution was studied and the dihedral angles of the three P-O-C-H systems were estimated.Abstract:
The phosphorus-31 nuclear magnetic resonance spectrum of β-adenosine-39-β-adenosine-59-phosphoric acid in its aqueous solution ( p H = 9.2) was studied. The signal consisted of eight peaks caused by the spin-spin coupling of the phosphorus nucleus with three protons, two on the 59 carbon, and one on the 39 carbon. The coupling constants were 3.4, 6.5, and 8.1 hertz; from these values the dihedral angles of the three P-O-C-H systems were estimated.read more
Citations
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Journal ArticleDOI
Spatial configuration of polynucleotide chains. II. Conformational energies and the average dimensions of polyribonucleotides.
Wilma K. Olson,Paul J. Flory +1 more
TL;DR: Chain dimensions are calculated for random coil poly rA chains in which stacking is introduced by both noncooperative and cooperative processes and the effects of partially stacked conformations in polyribonucleotides are investigated using the virtual bond treatment.
Journal ArticleDOI
Temperature dependence of the 31P chemical shifts of nucleic acids. A prode of phosphate ester torsional conformations.
TL;DR: The results support the earlier hypothesis that 31P shifts are sensitive probes of torsional conformations with phosphate esters in gauche,gauche conformations having31P shifts upfield from nongaucheformations.
Book ChapterDOI
Quantum-mechanical studies on the conformation of nucleic acids and their constituents.
Bernard Pullman,Anil Saran +1 more
TL;DR: The chapter reviews that quantum mechanics have been extensively used in the field of the conformational properties of the nucleic acid and their constituents, and that yielded the most complete and the most satisfactory description of the subject.
Journal ArticleDOI
31P NMR studies of NADPH and NADP+ binding to L. casei dihydrofolate reductase
TL;DR: The 31P NMR spectra of NADPH and NADP+ in their complexes with dihydrofolate reductase show effects from three-bond 1H-31P coupling constants which indicate that the conformation about one of the C5′–O5′ bonds changes when the coenzyme is bound to the enzyme.
References
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Journal ArticleDOI
Contact Electron‐Spin Coupling of Nuclear Magnetic Moments
TL;DR: In this article, the valence-bond theory for the contact electron-spin coupling of nuclear magnetic moments is used to calculate the proton−proton, proton-fluorine, and fluorine-florine coupling constants in ethanic and ethylenic molecules.
Journal ArticleDOI
The Methyl Alcohol Molecule and Its Microwave Spectrum
TL;DR: The theory of hindered rotation in methyl alcohol developed by Burkhard and Dennison has been extended to include the second-order Stark effect as well as a detailed discussion of K-type doubling as discussed by the authors.
The Methyl-Alcohol Molecule and its Microwave Spectrum.
TL;DR: The theory of hindered rotation in methyl alcohol developed by Burkhard and Dennison has been extended to include the second-order Stark effect as well as a detailed discussion of K-type doubling as mentioned in this paper.